During the annual Sustainability Fest at the University of Houston, members of the UH community had the chance to guess how many recyclable bottle caps were inside a glass container.

More than 120 people submitted their best estimate during the Nov. 13 event at Lynn Eusan Park. While nobody correctly guessed that the container had 419 bottles caps, Obinna Iwuchukwu came the closest when he pegged the tally at 420.

For his effort, he received a prize package containing an assortment of school supplies made from recycled materials, a Shasta plush toy, reusable water pouch, lip balm, lanyard and a bonsai tree kit.

The event, which was organized by the UH Office of Sustainability, celebrates all the sustainable efforts happening on campus.